Dongguan City, Xu-feng Hardware Products Factory is a professional manufacturer of metal springs, lathe parts and stamping parts of the enterprise, the factory has advanced technology and equipment, modern factories and professionals Tangxia spring manufacturers, selling products around the world. Purpose: spring washer device to prevent nut loosening the nut below. In the national standard in both instructions. Hexagon slotted screw nut is designed for the end of the bolt holes used in conjunction in order to insert the cotter pin from the nut of the screw holes in the tank, to prevent automatic return pine nuts, mainly for having vibration loads or alternating loads of occasions . Prevent mechanical design, production nut (or bolt) automatic back loose methods are: 1. Padded spring washer; (easy to do) 2 Hexagon slotted nuts with cotter pin +; (an increase of manufacturing processes) 3. . Padded washers; (an increase of manufacturing processes) 4 hex head bolt holes hexagonal wire insertion. (An increase of manufacturing processes) may need to contact me, oh! ! Dongguan City, Xu-feng Hardware Products Factory is a professional manufacturer of metal springs, lathe parts and stamping parts of the enterprise, the factory has advanced technology and equipment metal springs, modern factories and professional personnel, products sold around the world. Constant Spring compression spring tensile spring spring profiled spring winding spring toy stroller spring car spring electrical spring regulator spring antenna spring toy springs 0.08-8.0 various specifications spring) can produce various specifications of the spring diameter 0.08-8.0. All products are RoHS compliant. Material classification; stainless steel wire (sus) 301,302,303,304,305,309,310,316,321, ...... such materials are suitable for use with acid and alkali, high temperature. Electronics, electrical appliances, daily necessities, tools, locks, toys, etc., for a variety of products of carbon steel (SWC): electronics, electrical appliances, daily necessities, tools, locks, toys, etc., for a variety of products. Piano wire (swp) SWP-B; SWP-A (tensile strength, long life, suitable for a variety of products) copper phosphorus copper, tin-plated copper wire springs directly, nickel-plated copper, bronze, copper, phosphorus , copper, beryllium copper, etc. :( good electronic conductivity, electronics, appliances, antennas, etc.) appliances, antenna. Spring directly | Xufeng Hardware Factory (certified) | Dongguan, Dongguan City, the spring is provided by Xu-feng Hardware Products Factory. Dongguan City, Xu-feng Hardware Products Factory (www.dglijing168.com) is Dongguan, a leader in the spring, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Xufeng Hardware Factory leadership with the staff warmly welcome all inquiries negotiations to create Xufeng Hardware Factory a better future.